text: #include <rudiments/file.h>
  #include <rudiments/permissions.h>
  #include <rudiments/stdio.h>
  
  int main(int argc, const char **argv) {
  
  	// open the file
  	file	f;
  	f.open("testfile",O_RDWR|O_CREAT,
  				permissions::evalPermString("rw-rw-rw-"));
  
  	// write 4 fixed length records to the file,
  	// each consiting of two 10-character fields
  	f.write("                    ");
  	f.write("                    ");
  	f.write("                    ");
  	f.write("                    ");
  
  	// go to the first record
  	f.setPositionRelativeToBeginning(0);
  
  	// overwrite the first record
  	f.write("goodbye   friends   ");
  
  	// go to the last record
  	f.setPositionRelativeToEnd(-20);
  	f.write("hello     there     ");
  
  	// go to the third record
  	f.setPositionRelativeToBeginning(40);
  	f.write("bye       folks     ");
  
  	// go to the second record
  	f.setPositionRelativeToCurrent(-40);
  	f.write("hi        guys      ");
  
  
  	// print the records in reverse order
  	char	record[20];
  	for (off64_t i=1; i<=4; i++) {
  		f.setPositionRelativeToEnd(-20*i);
  		f.read(record,20);
  		stdoutput.write(record,20);
  		stdoutput.write('\n');
  	}
  }
  